Direct Rendering Manager
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The DRM is a component of the Direct Rendering Infrastructure, a system to provide efficient video acceleration (especially 3D rendering) on Unix-like operating systems, e.g. Linux, FreeBSD and NetBSD.
It consists on two in-kernel drivers (realized as kernel modules on Linux), a generic drm driver, and another which has specific support for the video hardware. This pair of drivers allows a userspace client direct access to the video hardware.
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